Abstract: An electromagnetic pickup for a guitar or similar stringed musical instrument has two coil and core assemblies adapted to extend across the strings of the associated instrument at different points along the length of the strings, the coil and core assemblies being associated with a permanent magnet means creating magnetic flux circuits through the cores and the strings. Each of the cores is in the form of an elongated strip having teeth vertically extending therefrom with the teeth being equal in number to the strings of the instrument and spaced in conformity with the string spacing so that each tooth of each core can underlie a respective one of the strings. The elongated strip of one core is located adjacent to the strings and that of the other core is located remote from the strings so that somewhat different signals are induced by string vibration in the coils associated with the two different cores. Each core carries two separate coils.

Abstract: An expansion joint has a seal with symmetrical ridges located on either side. One support extends on each side of the seal and each support has a base and cover that together contain a channel. Each channel is formed from a groove in each of the base and cover, each groove having side walls that continuously diverge from one another to an open face of said groove. The channel is of similar size and shape, but slightly smaller than the ridge so that each ridge is held snugly under pressure in each of the channels. The peculiar shape of the channel allows the supports to be bend in a vertical or horizontal plane while maintaining the channel intact.

Abstract: A programmable interference system for use with clustered radio transmitters and receivers operating aboard aircraft, as well as seafaring or land based installations, and which may interfere with each other. The invention uses a central processing unit with associated memory which provides pulse treatment including delay and/or extension of the blanking pulses as generated by the radio transmitters and such that the pulse treatment may be programmed by preselecting and storing the parameters of the pulse treatment in the memory from where they may be called into operation to control variable delay and extension circuit elements. The invention is especially suited to operate with aircraft having a multiplex bus that carries all the control data from flight controls as well as from the cockpit on a time divided multiplexed basis.

Abstract: In the present invention an elongated fabric web is advanced horizontally across a table by motor-driven rollers in a horizontally pivoted web forming device. The web forming device folds the web up along longitudinal fold lines before passing it through an opening in a metal fastener member held upright by a horizontally pivoted holder. The web forming device is pivotally retracted upwardly, and a web folding device folds over the leading end of the web and also rocks the holder to move the fastener member to a substantially horizontal position during this fold-over operation. A label is applied to the top of the web before the fold-over operation. The folded-over web and the applied label are slid across the table by a transfer device to a position where an automatic sewing machine sews a permanent end loop in the web and sews the label to the web next to this end loop.